Because Americans spend up to 90% of their time indoors, indoor allergens and irritants play a significant role in triggering asthma attacks. Asthma triggers can cause asthma symptoms, spark an attack, or make asthma worse. Triggers include secondhand smoke, dust mites, pests, molds, pets, and more.
If you have asthma, you may react to just one trigger or you may find that several things act as triggers. Be sure to work with a healthcare provider to identify triggers and develop an Asthma Action Plan that includes ways to reduce exposures to your asthma triggers.
Learn about how EPA’s Indoor airPLUS program can help reduce asthma triggers in new homes.